You know the law of Usenet that any spelling flame will itself contain a spelling error? I just ran across something similar on a post about kitchen mnemonics:

A quart means a quarter of a gallon. Or was that so obvious that it's not worth pointing out? Also, 4 cups in a quart, easy to remember since quart means four. (On a smaller scale, same theme, four ounces in a quarter cup.)

Ignoring the off by a factor of two error, it is interesting reasoning that "quart" both means "a quarter" and "four", and therefore must maintain a 4:1 ratio with the next largest and smallest sizes. It would be amusing to see how Erica describes why "pint" is an obvious term as well.